@media screen and (min-width: 320px){
  html {font-size: 42.67px}
}
/*锤子*/
@media screen and (min-width: 360px){
  html {font-size: 48px}
}
/*iphone 6*/
@media screen and (min-width: 375px){
  html {font-size: 50px}
}
@media screen and (min-width: 384px){
  html {font-size: 51.2px}
}
@media screen and (min-width: 393px){
  html {font-size: 52.4px}
}
@media screen and (min-width: 412px){
  html {font-size: 54.93px}
}
/*iphone 6 plus*/
@media screen and (min-width: 414px){
  html {font-size: 55.2px}
}

@media screen and (min-width: 480px){
  html {font-size: 64px}
}

@media screen and (min-width: 540px){
  html {font-size: 72px}
}
@media screen and (min-width: 600px){
  html {font-size: 80px}
}
@media screen and (min-width: 640px){
  html {font-size: 85.33px}
}

@media screen and (min-width: 750px){
  html {font-size: 100px}
}
